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CHCNAV Apache 4 - Autonomous Hydrographic Survey USV

Product Overview: The CHCNAV Apache 4 is a professional unmanned surface vessel (USV) designed for autonomous hydrographic surveys. It is equipped with advanced navigation technology and an array of features that make it an ideal choice for precise water flow velocity and discharge measurements in shallow waters. Its robust design, combined with its high navigational accuracy and stable hovering capabilities, makes the Apache 4 a reliable tool for hydrologists and survey professionals.

Key Features:

Advanced Navigation Controller

  • Adaptive Water Flow Technology: Integrated adaptive water flow straight-line and hovering technology enables the Apache 4 to navigate straight along the cross-section, even when flow rate and turbulence change. The hovering technology ensures stable operation at the start and end points of ADCP observation, improving the accuracy of flow estimation.

Built-In Single-Beam Echo Sounder

  • Accurate Depth Measurement: The single beam echo sounder verifies the accuracy of ADCP bottom tracking data and provides water depth profile data associated with flow velocity profile measurements.

Smart Positioning and Navigation

  • Stable Positioning: Provides stable position and heading to the ADCP and autopilot. The IMU sensor ensures position data availability even during momentary GNSS signal loss. The obstacle avoidance radar system and live video feed ensure safe operations in challenging conditions.

Compatibility with ADCPs

  • Versatile Design: The central access shaft design is compatible with most common ADCPs, such as M9, RTDP 1200, RiverPro, and RiverRay. The Apache 4 supports positioning, orientation, power, waterproofing, network, and 4G transmission solutions for ADCPs.

Autonomous Survey Capabilities

  • High Accuracy: Offers high-quality data for flow and velocity measurements in challenging environments, such as in front of dam structures or during flood level measurements.

Technical Specifications:

  • Hull Material: Macromolecule polyester carbon fiber
  • Dimensions: 1200 mm x 750 mm x 400 mm
  • Weight: 13 kg (excluding sensors)
  • Maximum Speed: 6 m/s
  • Battery: 5 x 32.4 V, 23.1 Ah
  • Battery Life: 2 x 4 hours at 2 m/s
  • Communication Range: 2 km (R/C), unlimited (4G)
  • Obstacle Avoidance: Millimeter wave, 0.2-40 m detection range
  • GNSS Systems: BDS B1/B2, GPS L1/L2, GLONASS L1/L2, Galileo E1/E5, QZSS
  • Positioning Accuracy: Horizontal: ±8 mm + 1 ppm, Vertical: ±15 mm + 1 ppm
  • Inertial Navigation: 200 Hz IMU update rate, 0.2° @1 m baseline heading accuracy
  • Waterproof Rating: IP67

Why Choose the CHCNAV Apache 4? The Apache 4 offers an unparalleled combination of advanced navigation technology, robust design, and high precision, making it the ultimate solution for autonomous hydrographic surveys. Whether for water flow velocity and discharge measurements or challenging survey environments, the Apache 4 ensures reliable and accurate data collection.

Enhance your hydrographic survey capabilities with the CHCNAV Apache 4 – the advanced autonomous USV for professional hydrographic surveys.

Apache 4 USV features

Autonomous hydrographic and bathymetric surveys USV



An Unmanned Surface Vessel (USV) that supports a wide variety of Acoustic Doppler
Current Profiler (ADCP) systems available on the market.